First, this should really go into Beginners Corner. Anyway, it looks like you did not set JAVA_HOME. If you had set it, as you had indicated, then the "JAVA: java" line in the output would have read: JAVA: /usr/local/j2sdk1.4.2_15/bin/java Instead, the Java that came with your Linux distro was used, and such JVMs are not supported. Finally, to run JBoss AS 4.2 you will need a 1.5 JDK. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4086433#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...